The main files are pretzangles.exe and its help file pretzangles.chm

hh.exe is used to view the .chm file and ijl11.dll lets you save things as jpgs. VB6 did not have native ways of doing what we now all take for granted, so these extra files are needed.

The zipped files such as Archimedean.zip contain useful sets of pretzangle files. To avoid clutter, it's suggested that you unzip them to their own sub-folder and you can experiment with them. They are not required for running the program, they are only there in case you find them interesting or instructional.